The attorney general’s office investigated the proposed merger between GrubHub and Seamless and decided that the food-delivery giants may go ahead with their blessed union of Extra Napkins Please if the two companies agreed to a few things up front: First, Seamless will dissolve existing exclusivity agreements with Manhattan restaurants within 45 days of the merger’s beginning. Meanwhile, new exclusivity deals will be forbidden for the GrubHub-Seamless behemoth from here on out, and finally, plucky little Yelp — which is about to integrate ordering and delivery services of its own with the help of Eat24 and Delivery.com — will similarly be barred from making restaurant proprietors sign Yelp-only deals. Attorney General Eric T. Schneiderman’s office released a statement explaining that the rules are designed to help small business owners “reach new customers and obtain much-needed extra business.” [Earlier]